Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
nam thuc » am thuc, nam thu, nam tu
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, dam thuc
va dung » van dung, va duong, vat dung
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky lang xa hoi. hieu va ((cam tuc) or (((nam thuc) OR (nam thuoc)))) va dung tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky lang xa hoi. hieu va ((cam tuc) OR (((nam thuc) OR (nam thuoc)))) va dung tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky lang xa hoi. hieu va ((cam tuc) or (((nam thuc) OR (nam thuoc)))) va dung tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky lang xa hoi. hieu va ((cam tuc) or (((nam thuc) OR (nam thuoc)))) va dung tai cua tre*.